andrews



(No Mod eL) 2 Sheets-Sheet 1 U. W. ANDREWS.

HUTE L DOOR LOCK.

No. 571,210. Patented Nov. 10, 1896.

(No Model.) 7 2 Sheets-Sh'eet 2.

C, W. ANDREWS. HOTEL DOOR LOOK.

Patented Nov. .10, 1896.

UNITED STATES PATENT EETCE.

CHARLES W. ANDREIVS, OF N EW' HAVEN, CONNECTICUT, ASSIGNOR TO THEMALLORY & \VHEELEB COMPANY, OF SAME PLACE.

HOTEL-DOOR LOCK.

' SPECIFICATION forming'part of Letters Patent No. 571,210, datedNovember 10, 1896.

I Application filed .Inly Z, 1896. Serial No. 597,855. (No model.)

[0 all whom it ntcty concern:

Be it known that I, CHARLES W. ANDREWS, of New Haven, in the county ofNew Haven and State of Connecticut, have invented a new Improvement inHotel-Door Locks; and I do hereby declare the following, when taken inconnection with the accompanying drawings and the letters of referencemarked thereon, to be a full, clear, and exact description of the same,and which said drawings constitute part of this specification, andrepresent, 1n-- Figure 1, a side view of a hotel-lock embodying myinvention; Fig. 2, a side view of the lock with the cap removed, showingboth bolts in the retired position; Fig. 3, a lower portion of the lockmechanism, showing the lower or inside bolt thrown outward; Fig. 4,

a perspective view of the lower bolt de tached; Fig. 5, a perspectiveview of the locking-lever detached; Fig. 6, the grand masterkey; Fig. 7,the pass-key; Fig. 8, the masterkey.

This invent-ion relates to an improvement in door-locks, andparticularly to that class known as hotel-locks, that is, locks havin gtwo bolts, one of which may be operated from the outside and the otherfrom the inside.

In looks of this character it is desirable that some means should beprovided to indicate when the door is locked upon the inside. At thesame time, in caseof accident, it is desirable that an authorized personshould be enabled to unlock the door without forcing or deranging'thelock.

The object of this invention is to arrange and construct the bolts-sothat the door may be locked from either side and when looked upon theinside will prevent the insertion of a regular or sub master-key fromthe outside, and to provide means for the insertion of a grandmaster-key, whereby the bolts may be thrown from the outside in case ofemergency; and the invention consists in the construction, ashereinafter described and particularly recited in the claims.

The case A may be of any preferred construction, arranged with orwithout knoblatch mechanism, and provided with an outside looking-boltB, in connection with tumblers G, more or less in number and of usualconstruction, said bolt being adapted to be thrown by a key entering theoutside of the case through the key-slot D. Below the bolt B is theinside bolt E, adapted to be thrown from the inside by a key enteredthrough a key-slot F on the inside of the case and engaging with thekey-notch E in the lower edge of the tail E of the bolt. Extending 6oupward through a slot Gin the tail E is a post H, formed on the insideof the case. Mounted upon a stud I, formed on the face of the tail E inrear of the slot G, is a lever or tumblers J, formed at its forward endwith an upwardly-extending finger K, which, when both bolts arewithdrawn, stands slightly in rear of the head of the bolt B, as shownin Fig. 2, but passes beneath the bolt when the inside bolt E is thrown,as shown in Fig. 3. The inner face of the lever is recessed to receive aspring L, one end of which is secured in the stud I and the opposite endin a slot M in the rear end of the lever, which spring tends to normallyhold the lever J in line 7 5 with the tail E of the inside bolt. Nearthe forward end of the lever is astunip N, which engages with the rearside of the post II when the bolt is withdrawn and with the oppositeside when the bolt is in the thrown position, thus locking the bolt ineither position. In the upper edge of the lever is akey-notch O, whichcoacts with a key-notch P in the upper edge of the tail E of the bolt.Extending from the same center as the key-slot D is a narrow slot Q,which will only admit a key having a thin bit, as shown in Fig. 6. Itwill be understood that the bolts are adapted to be thrown by the sameregular key and those of a series by the same sub master-key or 0 grandmaster-key.

The operation of the lock is as follows: The door is locked or unlockedfrom the outside by the bolt Bthrough a keyentering the slot D, and maybe locked or unlocked from the inside by a key entering the key-slot Fand acting upon the under side of the lever J and tail E the key firstlifting the lever to clear the stump N from the post H and then throwingthe bolt, the stump then passing at one side of'the post II andreturning to aposition in front of it, whereby the bolt is held againstretraction. In this position the upper edge of the rear end of the leverstands in the path of the key-slot D, as indicated in Fig. 3, so that itis impossible to insert a regular or sub master-key or any other keythrough that opening, at once indicating to a person on the outside ofthe door that the door is locked on the inside. When the door is solooked upon the inside, the finger K of the lever J stands beneath thebolt B, which positively prevents ,niovement of the lever J, and henceavoids the possibility of picking the look from the outside. In case ofaccident or emergency when it is desirable to open the door from theoutside after it has been looked upon the inside a grand master-key maybe inserted through the narrow key-slot Q and turned to first throw theoutside bolt, which clears the finger K. The continued movement of thegrand master-key will operate upon the lever J, through the notch O, todepress that end of the lever and throw the stump out of engagement withthe post H, and then upon the notch P in the bolt to withdraw the bolt.The key is then turned in the opposite direction to withdraw the bolt B,and thus unlock the door. It will be understood that the escutcheon onthe outside of the door is provided with two key-slots corresponding tothe slots in the case, one being so narrow as to prevent the ordinaryregular or the master key from entering. The locks are so arranged thatthe regular or sub master-key will operate upon the lower sides of bothbolts, while the grand master-key not only operates upon the lower sidesof both bolts, but also upon the upper side of the inside bolt.

I am aware that hotel-locks having two bolts adapted to be independentlyoperated are old, and therefore do not wish to be understood asclaiming, broadly, such as my invention.

I claim 1. The herein-described lock having two bolts and tumblerstherefor, both bolts and their tumblers adapted to be thrown by keysoperating upon their lower edges, and the or unlocked position, andadapted with the bolt to be thrown or withdrawn by a key operating uponits lower edge, and also adapted to be withdrawn by a key operating uponits upper edge after the upper bolt has been thrown, substantially asdescribed.

3. In a two-bolt lock the combination with a lower bolt formed withkey-notches in the upper and lower edges of its tail, of a leverpivotally mounted upon the said tail, a spring also mounted on said tailand extending into engagement with the rear edge of said lever, anupwardly-extended finger at the forward edge of said lever, a stump onsaid lever coacting with the post in the case for holding the bolt inthe locked or unlocked position, said lever formed with anoperating-notch in its upper edge and adapted when thrown to close thekey-opening in the outside of the case, substantially as described.

4-. The herein-described lock having two bolts and tumblers therefor,both adapted to be moved by keys operating upon their lower edges, thelock-case formed with two keyslots extending from the same center, andlocated between the said bolts, one of said slots narrower than theother, and the lower bolt adapted to be withdrawn by a key enteredthrough the narrow slot and operating upon its upper edge after theupper bolt has been thrown, substantially as described.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

CHARLES IV. ANDREIVS.

\Vitn esses:

FRED. O. EARLE, LILLIAN D. KELsEY.

